2021-11-04, 09:19 PM
Hi BMD,
I'm glad that you were able to input extra elements too. I didn't get any problems with the MP DB. I opened & searched it & the new entries appear to be correct. As far as labeling the element sets with a date&time designation, I'd rather keep the references to the object in the DB so I can find them again when it's time to delete them. If they're linked to the close approach date, it might be hard to find them again.
What I thought was a problem with the dates & times wasn't because both CNEOS & HORIZONS use UT.
Stepping through the time on the IA is cool because it shows how the positions change for each set of elements with the change in time. The position difference from the Nov 3 elements from MPC yesterday to the elements for Nov 8 & 9 from HORIZONS are eye opening, as are the differences among the HORIZONS elements. Since the orbit for 2019 XS is well determined, I think this is due to the purturbations from the close approach. No single set of osculating elements can account for these changes.
As for getting the blue target circle, the target must be bright enough. Try changing the displayed magnitude of the MPs to a fainter magnitude. ST4 displays fainter objects as you zoom in. I've set my IA to display 11th mag at 30° field. At 5° field the mag limit is 14.6; however, the MPs are set to display 3 magnitudes fainter, so 17.6 mag.
2021 UO7 isn't in the list of MPs that were downloaded from MPC yesterday, so it's a new one.
Phil S.
I'm glad that you were able to input extra elements too. I didn't get any problems with the MP DB. I opened & searched it & the new entries appear to be correct. As far as labeling the element sets with a date&time designation, I'd rather keep the references to the object in the DB so I can find them again when it's time to delete them. If they're linked to the close approach date, it might be hard to find them again.
What I thought was a problem with the dates & times wasn't because both CNEOS & HORIZONS use UT.
Stepping through the time on the IA is cool because it shows how the positions change for each set of elements with the change in time. The position difference from the Nov 3 elements from MPC yesterday to the elements for Nov 8 & 9 from HORIZONS are eye opening, as are the differences among the HORIZONS elements. Since the orbit for 2019 XS is well determined, I think this is due to the purturbations from the close approach. No single set of osculating elements can account for these changes.
As for getting the blue target circle, the target must be bright enough. Try changing the displayed magnitude of the MPs to a fainter magnitude. ST4 displays fainter objects as you zoom in. I've set my IA to display 11th mag at 30° field. At 5° field the mag limit is 14.6; however, the MPs are set to display 3 magnitudes fainter, so 17.6 mag.
2021 UO7 isn't in the list of MPs that were downloaded from MPC yesterday, so it's a new one.
Phil S.